EP0608432A4 - Element de polarisation, element optique et tete optique. - Google Patents

Element de polarisation, element optique et tete optique.

Info

Publication number
EP0608432A4
EP0608432A4 EP93914992A EP93914992A EP0608432A4 EP 0608432 A4 EP0608432 A4 EP 0608432A4 EP 93914992 A EP93914992 A EP 93914992A EP 93914992 A EP93914992 A EP 93914992A EP 0608432 A4 EP0608432 A4 EP 0608432A4
Authority
EP
European Patent Office
Prior art keywords
optical
polarizing element
slant faces
optical head
path length
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP93914992A
Other languages
German (de)
English (en)
Other versions
EP0608432B1 (fr
EP0608432A1 (fr
Inventor
Taro Takekoshi
Masatoshi Yonekubo
Takashi Takeda
Toshio Arimura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seiko Epson Corp
Original Assignee
Seiko Epson Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP5057431A external-priority patent/JPH0682613A/ja
Priority claimed from JP06434893A external-priority patent/JP3261794B2/ja
Application filed by Seiko Epson Corp filed Critical Seiko Epson Corp
Priority to EP99203376A priority Critical patent/EP0981063A3/fr
Publication of EP0608432A1 publication Critical patent/EP0608432A1/fr
Publication of EP0608432A4 publication Critical patent/EP0608432A4/fr
Application granted granted Critical
Publication of EP0608432B1 publication Critical patent/EP0608432B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10532—Heads
    • G11B11/10541—Heads for reproducing
    • G11B11/10543—Heads for reproducing using optical beam of radiation
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10532—Heads
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10532—Heads
    • G11B11/10534—Heads for recording by magnetising, demagnetising or transfer of magnetisation, by radiation, e.g. for thermomagnetic recording
    • G11B11/10536—Heads for recording by magnetising, demagnetising or transfer of magnetisation, by radiation, e.g. for thermomagnetic recording using thermic beams, e.g. lasers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/094—Methods and circuits for servo offset compensation
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/13—Optical detectors therefor
    • G11B7/131—Arrangement of detectors in a multiple array
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1353—Diffractive elements, e.g. holograms or gratings
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1356—Double or multiple prisms, i.e. having two or more prisms in cooperation
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1365—Separate or integrated refractive elements, e.g. wave plates
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1381—Non-lens elements for altering the properties of the beam, e.g. knife edges, slits, filters or stops
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1372—Lenses
    • G11B2007/13727—Compound lenses, i.e. two or more lenses co-operating to perform a function, e.g. compound objective lens including a solid immersion lens, positive and negative lenses either bonded together or with adjustable spacing

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Head (AREA)
  • Polarising Elements (AREA)

Abstract

On crée une pluralité de faces inclinées (1419) sur un substrat (1406). On constitue une couche mince optique polarisée sur les faces inclinées. On remplit l'évidement défini par les faces inclinées (1419) avec un matériau transparent, de façon à constituer un petit élément de polarisation composite. Cet élément de polarisation permet de détecter les signaux magnéto-optiques, dont le rapport de transmission et d'extinction est excellent et le rapport S/N élevé. L'élément de polarisation sert également de couverture du boîtier (1408) d'une tête optique logeant un élément photodétecteur (1409) et un élément électroluminescent (1411) faisant partie de l'ensemble. L'utilisation d'un élément optique possédant une fonction de réglage de la longueur du trajet optique servant à modifier la longueur du trajet optique du faisceau lumineux sortant par rapport à celui du faisceau lumineux entrant, permet également d'éliminer le décalage initial des signaux d'erreur de point focal et d'éviter simultanément le réglage. De cette façon, il est possible de réaliser une tête optique de petite dimension, de conception simple et extrêmement performante s'utilisant pour des enregistrements magnéto-optiques et des appareils de reproduction.
EP93914992A 1992-07-14 1993-07-13 Element de polarisation, element optique et tete optique Expired - Lifetime EP0608432B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP99203376A EP0981063A3 (fr) 1992-07-14 1993-07-13 Polarisateur, ELEMENT OPTIQUE ET TETE OPTIQUE

Applications Claiming Priority (10)

Application Number Priority Date Filing Date Title
JP18688592 1992-07-14
JP18688592 1992-07-14
JP186885/92 1992-07-14
JP5057431A JPH0682613A (ja) 1992-07-14 1993-03-17 光学素子及び偏光素子及び検光子及び光ヘッド及び光磁気信号検出手段及び光学素子製造方法
JP57431/93 1993-03-17
JP5743193 1993-03-17
JP06434893A JP3261794B2 (ja) 1993-03-23 1993-03-23 光ヘッド
JP64348/93 1993-03-23
JP6434893 1993-03-23
PCT/JP1993/000964 WO1994001794A1 (fr) 1992-07-14 1993-07-13 Element de polarisation, element optique et tete optique

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP99203376A Division EP0981063A3 (fr) 1992-07-14 1993-07-13 Polarisateur, ELEMENT OPTIQUE ET TETE OPTIQUE

Publications (3)

Publication Number Publication Date
EP0608432A1 EP0608432A1 (fr) 1994-08-03
EP0608432A4 true EP0608432A4 (fr) 1996-04-10
EP0608432B1 EP0608432B1 (fr) 2001-02-21

Family

ID=27296258

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93914992A Expired - Lifetime EP0608432B1 (fr) 1992-07-14 1993-07-13 Element de polarisation, element optique et tete optique

Country Status (4)

Country Link
US (1) US5825022A (fr)
EP (1) EP0608432B1 (fr)
DE (1) DE69329945T2 (fr)
WO (1) WO1994001794A1 (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5757754A (en) * 1994-06-30 1998-05-26 Matsushita Electric Industrial Co., Ltd. Holographic optical head
KR100259490B1 (ko) * 1995-04-28 2000-06-15 윤종용 광검출기 일체형 표면광 레이저와 이를 채용한 광픽업 장치
US6654061B2 (en) * 1995-06-14 2003-11-25 Canon Kabushiki Kaisha Automatic focus adjusting apparatus and method utilized by an image sensing apparatus
JPH11231308A (ja) * 1998-02-16 1999-08-27 Seiko Epson Corp 投写型表示装置
US6975576B1 (en) * 1999-07-13 2005-12-13 Kabushiki Kaisha Toshiba Optical head device and disk drive system having first and second light sources for emitting light beams of different wavelengths
TWI251089B (en) * 2000-06-19 2006-03-11 Nitto Denko Corp Polarizer, polarizing plate, and liquid crystal display using the same
US6515744B2 (en) * 2001-02-08 2003-02-04 Therma-Wave, Inc. Small spot ellipsometer
US6775061B2 (en) * 2002-05-17 2004-08-10 Thomson Licensing S. A. Reflecting light polarizer made of coated non-linear surfaces
CN1759492B (zh) * 2003-03-10 2010-04-28 丰田合成株式会社 固体元件装置的制造方法
KR20070074787A (ko) * 2005-06-13 2007-07-18 삼성전자주식회사 계조 전압 발생 장치 및 액정 표시 장치
DE202005011847U1 (de) * 2005-07-28 2005-10-27 Leuze Electronic Gmbh & Co Kg Optischer Sensor
JPWO2008018247A1 (ja) * 2006-08-09 2009-12-24 日本板硝子株式会社 透過型偏光素子及びそれを用いた複合偏光板
WO2010001772A1 (fr) * 2008-07-04 2010-01-07 アルプス電気株式会社 Composant optique ayant une structure antireflet et procédé de fabrication du composant optique
US9922935B2 (en) 2014-09-17 2018-03-20 Samsung Electronics Co., Ltd. Semiconductor package and method of fabricating the same
KR20160032958A (ko) 2014-09-17 2016-03-25 삼성전자주식회사 반도체 패키지 및 이의 제조 방법
WO2016093066A1 (fr) 2014-12-08 2016-06-16 株式会社リコー Déflecteur de lumière, dispositif d'affichage d'image, et dispositif objet
KR102436320B1 (ko) * 2015-03-02 2022-08-25 엘지이노텍 주식회사 근조도 센서 및 이를 포함하는 휴대용 단말기

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992022838A1 (fr) * 1991-06-13 1992-12-23 Minnesota Mining And Manufacturing Company Polariseur a retroreflexion
EP0573905A1 (fr) * 1992-06-08 1993-12-15 Minnesota Mining And Manufacturing Company Polariseur rétrorefléchissant pour systèmes de présentation

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4733065A (en) * 1984-06-27 1988-03-22 Canon Kabushiki Kaisha Optical head device with diffraction grating for separating a light beam incident on an optical recording medium from a light beam reflected therefrom
JPS6117103A (ja) * 1984-07-04 1986-01-25 Canon Inc 偏光ビ−ムスプリツタ
JPS6282525A (ja) * 1985-10-08 1987-04-16 Toshiba Corp 光学ヘツド
US4973836A (en) * 1987-03-31 1990-11-27 Canon Kabushiki Kaisha Optical pickup device including a beam splitter having an inclined plane
US4933924A (en) * 1987-07-03 1990-06-12 Seiko Epson Corporation Optical head and magneto-optical read/write device
JP2639659B2 (ja) * 1987-11-02 1997-08-13 セイコーエプソン株式会社 光ヘッド
US5486949A (en) * 1989-06-20 1996-01-23 The Dow Chemical Company Birefringent interference polarizer
US5646778A (en) * 1991-05-28 1997-07-08 Discovision Associates Optical beamsplitter
US5422870A (en) * 1991-09-27 1995-06-06 Matsushita Electric Industrial Co., Ltd. Optical pickup for information recording/reproducing apparatus
EP0579843B1 (fr) * 1992-02-07 1999-12-22 Sony Corporation Appareil capteur optique pour une fonction de stockage magneto-optique

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992022838A1 (fr) * 1991-06-13 1992-12-23 Minnesota Mining And Manufacturing Company Polariseur a retroreflexion
EP0573905A1 (fr) * 1992-06-08 1993-12-15 Minnesota Mining And Manufacturing Company Polariseur rétrorefléchissant pour systèmes de présentation

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
M.P.WEBER: "23.3:RETROREFLECTING SHEET POLARIZER", 1992 SID INTERNATIONAL SYMPOSIUM,DIGEST OF TECHNICAL PAPERS, 17 May 1992 (1992-05-17), BOSTON,US, pages 427 - 429 *
See also references of WO9401794A1 *

Also Published As

Publication number Publication date
DE69329945D1 (de) 2001-03-29
WO1994001794A1 (fr) 1994-01-20
EP0608432B1 (fr) 2001-02-21
EP0608432A1 (fr) 1994-08-03
US5825022A (en) 1998-10-20
DE69329945T2 (de) 2001-06-07

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